Work driver



Marh 13, 1945- o. JE. oLssoN WORK DRIVER .original Filednec. e, 1940 lNvENToR oLov J. E. oLoN BY MM v ATTORNEY Patented Mar. 13, 1945 s PATENT OFFICE WORK DRIVER Olov J. E. Olsson, Minneapolis, Minn., assignor to Storm Manufacturing Company, Inc., Minne- 4 apolis, Minn., a corporation of Minnesota Original application December 26, 1940, Serial No.

371,813. Divided and this application December 22, 1943, -Serial No. 515,271

s claims. (ci isz- 43) This application is a division of my pending application Serial No. 371,813, for Machine for grinding and turning brake drums, filed Decemper ze, 1940.

The invention here presented relatesto a work driver, so-called.

An object of the invention is to provide a work driver of the present character which will be of novel and improved construction.

A further object is to provide a work driver 'the invention comprises the construction, ar'- rangement and combination of parts as now Vto extend inwardly in oblique or bevel relationy to 1o wherein will be incorporated various improved be fully described and as hereinafter to be specically claimed, it vbeing understood that the disclosure herein is merely illustrative andintended in no way in a limiting sense, changes in details of construction and arrangement of parts Vlosing permissible so long as within the-spirit of 'the invention and the scope of the claims which follow. l

In the accompanying drawing forming a part of this specification,

Fig. 1 is a top plan view of a machine in which the features and characteristics of the invention are incorporated;

Fig. 2 is an enlarged sectional View of a work y driver, or work drum support, of the machine of Fig. 1, taken substantially on line 2--2 in Fig. `1;

the disclosure of Fig. 2, but showing a work driver, or brake drum support, of modified construction adapted to be employed in the machine machine, is denoted generally at I0. Said frame I0 rigidly supports an extension portion I I of the frame which in turn rigidly supports an electric motor I2.

The frame I0 also supports a carriage I3I adapted to be reciprocated upon the frame in direction longitudinally thereof and transversely of the shaft I4 of the electric motor I2. More explicitly, said carriage I3 includes a base portion thereof slidably movable over an adjacent surface ,base portion and the carriage surface.

of the frame I0, and oppositely disposed, oblique or bevel flange portions thereof slidably movable over oblique or bevel surfaces `of said frame I0 which are opposite said base portion and said frame surface. Stated otherwise, the oppositely disposed, oblique or bevel flange portions of said carriagev I3 are spaced from the base portion of they carriage, as well as from each other, and

I0 and perpendicularly to the direction in which lsaid carriage is reciprocable along said frame. More explicitly, said bracket member I5 includes a base portion thereof slidably movable over an adjacent surface of the carriage I3, andoppositely disposed, oblique or bevel flange portions thereof slidably movable over oblique or bevel surfaces of said carriage which are opposite said Stated otherwise, the oppositely disposed, oblique or bevel iiange portions of the bracket member I5 are 'spaced from the base portion of said bracket member, as well as from each other, and extend inwardly in oblique or bevel relation to the base portion of the bracket member, to provide oppositely disposed guideways ofsaid bracket member extending transversely of the carriage I3 in which opposite side edge portions of said carriage are snugly, slidably situated. The bracket member I5 is adapted to be adjusted transversely of the carriage I3 by slidable-movement of said bracket member and its oppositelydisposed guideways along the opposite side edge portions of said carriage.

Said bracket member I5 supports, or includes, several, or a number of, parts of the ygrinding and turning machine, and mechanism is kincluded for accomplishing sliding .adjustment of the bracket member, with parts supported thereby, transversely of the carriage,and for causing said bracket member tobe secure at any position to which set crosswise of said carriage.

As disclosed, the bracket member I5 includes an integral arm. I6 disposed perpendicularly to the base portion of said bracket member andv situated adjacent the side portion of the carriage which is opposite the electric motor I2, in spaced relation to and alining relation with said carriage. An adjusting member or screw II is rotatably mounted and fixed against longitudinal movementin the .arm L6, and an end portion of said adjustingtmember or screw I'I is threadably mounted in said side portion of said carriage opposite said electric motor. A slot (not shown) in the carriage I3 at the side of the last mentioned side portion of said carriage which is opposite the arm I6 provides clearancefor relative movement of the carriage and the adjusting member or screw, Said adjusting member .or;screw`-I1 is arranged perpendicularly to said -arm I5 and parallelly of, or in alinementwith, vthe `carriage I3, and the end portion of the adjusting member or screw I1 which is opposite the threaded end portion xedly supports a hand piece lvithrough the instrumentality of which said adjusting member or screw `can'loe rotated, thus to accomplish adjustment of theA bracket member I5 transversely ofthe frame l and the carriage I3. 'By turning adjustmentV of the member or screw I'I in one direction, it will becaused to move inwardly of -the carriage, thus to cause the bracket member I to be adjusted inwardlyand by turning movement o f ,said member `or Ascrew in .opposite direction, it willbe caused .to move outwardly of said carriagathusto cause saidbracket `member to be adjusted outwardly. Obviously, the bracket member I5 Vwill be secured in fixed relation to the carriage .at any location along the width of said carriage .to which said .bracket member may `beadjusted.-

A work driver, lor mechanism for vsupporting and rotating a `brake .,drum, or thelike, tobe ground.and'. turned in .the ma'Chine, is also included, as well `as is mechanism for accomplish- ,ing reclprocation .of the carriage I3, together with the bracket memberi and theparts supported, orincluded, by said bracket member, upon the frame 10.

T hedriven shaft Iof the electric motor I2 is :at the Sidooi the .frame Ill and the carriage i3 which is opposite thehandpiece I8. A gear ca s- .ine `1.9, oootitutodas-a-part of the .frame of the machine, vaiitalolv land Conveniently rotatably supports o driving fshaitl disposed transversely of said frame and porollollvfof thomoior Shaft J4 infsneood relation to said motor shaft- A11 outer-portion@ tho .driving shoftiiixodlyoar- .rios sliep `Polifafs ,2l which oroalinod with step pulleys 2.2 fixed upon the moiorshaft f4, and o boit 23 rides .the pulleys 2| .and r22 in Customary fashion. An intermediate portion of said driving shaftZ iixedly carries a worm -24 which meshes with a worm wheel 25.

A hollow Work .spindle 25 isouiiably and oon- .veniently rotatably mounted, as by Timken bear,- ings 21,w in the gear casing I9, and said hollow work spindle is suitably and conveniently fixed against endwise or longitudinal movement in said gear casing. Said worm wheel 25 is situated in the gear casing I9, and is keyed, as at 28, upon an inner reduced portion 29 of the hollow work spindle. A small gear30, als@` keyed ,upon said hollow work spindle at 28, is situated at the side of the worm wheel 25opposite the Timken bearings and in contiguous relation with a hub.3I integral with4 said worm wheel. A washer 32 is dis- .posedbetweensmd wormwheel andthe adjaent Timken bearinglLand a spacing slBVe33 is slidably situated u-pon said reduced portion 29 of the hollowwork spindle at the side of the small gear 30 which is opposite the hub 3l. Lock nuts 34 adjacent the end of the spacing sleeve 33 opposite the small gear 3i) and engaged with an external thread 35 upon the reduced portion 29 are adapted to be turned home against said spacingsleeve 33 thus to cause the worm wheel 25 and the hub vthereon and the small gear 39 to be clamped against each other and between the Yv vaslier 32 and the spacing sleeve 33 and said worm wheel and small gear to be xed against movement longitudinally of the hollow work spindle 2,6, .as will be apparent.

The small gear 136 is for driving a feed member :or screw 3B ,of the machine which is suitably and .riage I3 to be `fed forwardly or rearwardly, as

may be predetermined, through kthe instrumentality of gearing and clutch means, not necessary to be shown o r'described, interposed lbetween Athe small gear 38 and the vfeed member or screw. The manner in which said `feed member'or vscrew'is driven from said small gear3 forms'no part 'of the present invention.

A hand wheel' 31 lixed upon Aa freeend of vthe feed member or screw 36 at a side of :thegear casing I9 which is vopposite the carriage I3.i s for accomplishing rotational actuation of saidfeed member or screw, The construction and arrangement will be such that the feed member or -screw can be freely rotated'in either direction through the medium of .thehand wheel 31 when'the clutch means, above mentioned, is in neutral position.

The Timkenbearings '21 maintain the'hollow work ,spindle 26 .in exact parallel relation with the guideways provided by the carriage I3, as

'well as in precise parallel relation withthefeed Vmember or screw 3S, .at a side of said mentioned gui'cleways and said 'feed member or screw. An arbor 3 8 for supporting a brake drum 39 Yto be ground and turned includesa circular, taper part '4B of said arbor adapted to be seated in a longi- ,tudinally disposed opening di through the hollow .work spindle26. More explicitly, a part 42 of the to be snugly 'iitted draw rod "d3, including a head dil at its outer end and an externally threaded portion 45 atits inner end portion,`is for removably retaining the arbor 38 in rigid. re-

lation to the hollow work 'spindle' 26. disclosed,

the drow rod 143 oytoods'longitudinailv through the opening 1M, the externally threaded portion 45 of said draw rod is removably engagedgwth an internal thread '46 xin the inner end ofthe arbor "38, and the head 44 of the draw rodjis engaged against `the end of the .reduced portion "29 of'the hollow'workspindle 26 which'isoppovsite the'brake drum'SS.' iObviously, by `turning the head in onejdirection the .arbor 38 caribe made rigid with thehollow'work spindle, and by `f .urniifig said head "4'4 in 'opposite direction `the draw rod'43'can be released from saidoarbor; thus tor'ender the arbor removable from said hollow work spindle. When the head 44 of the draw rod is turned down against the reduced portion 29 of the hollow work spindle, the arbor 38 and said 'hollow work spindle evidently are secured to each other to be constituted asa unitary entity.

" As disclosed, the brake drum 39 is rigidly secured upon the end portion of the arbor-38 which is oppositethe hollow work spindle 26 by the employment of spaced apart collars 41 and 48 situated at and against the opposite end portions,

respectively, of a hollow hub 49 of'said brake that when the nut D is turned home, said hollow hub 49 will be rigidly engaged by the collars 41v and 48 to cause the brake drum 39 to be rigidly supportedupon the arbor 38 with its part to be ground and turned in precise concentric relation to said arbor and the hollow work spindle.

It will be apparent that with rotation of the hollow work spindle 26, Iby the electric motor l2 and through the instrumentality of a pulley 2 2, the belt 23, a pulley 2|, the driving shaft 20, the worm l241 and the worm Wheel 25, there will be rotation of the arbor 38 when rigid with said hollow work spindle and of the brake drum 39 when rigid with said arbor.

A cylindrical tool post having a clamping nut 5l upon the upper end thereof is situated at the midwidth of the bracket member l5 and is rotatably supported by said bracket member in upstanding, perpendicular relation to the bracket member. The manner in which the cylindrical tool post is supported upon the bracket member forms no part of the present invention.

A grinding tool holder of the machineis indicated at 52, and a turning tool holder is denoted at 53. The grinding tool holder and the turning tool holder are so mounted upon the cylindrical tool post that either the grinding tool 54 or the turning tool 55 selectively can be brought intoA engagement with the internal surface of a brake drum, such as 39, to be ground and turned.

The machine includes mechanisms, denoted generally at 56, for raising and lowering, or longitudinally moving, the grinding tool holder 52 along the cylindrical tool post. The just mentioned -mechanism need not be specifically described. It is no part of the present invention.

A supporting shaft 51 for the grinding tool 54 is rotatably mounted upon the grinding tool holder 52, and is adapted to be rotated through the instrumentality of a second electric motor 58 suitably and conveniently supported upon said grinding tool holder 52. A belt 59 rides a pulley 60 fixed upon the shaft of the electric motor 58 and also rides a pulley 6| fixed upon said supporting .shaft 51. A bracket 62 supports the electric motor 58 upon the grinding tool holder 52.

The electric motors I2 and 58 are adapted to be energized by current from a source (not shown) of electrical energy, and a circuit for said electric motors is adapted to include an on-and-off switch (not shown). 'I'he on-and-oik switch is adapted to be operated both manually and automatically, in a manner forming no part of the present invention.

In Fig. 3 there is disclosed a work driver, or brake drum support, of modified construction adapted to be employed'inthemachine. Parts in said Fig.3 similar to parts previously described bear the same reference numerals.

The gear casing I9 rotatably supports the hollow work'spindle 26, as by Timken bearings 21, as before set forth. lThe worm wheel 25 and the small gear 30 are keyed to said hollow work spindle and are fixed against movement longitudinallyofthe hollow work spindle in the manner as hereinbefore stated. v

An arbor 63 integral with a brake drum 64 to beground and turned extends through a longitudinal opening 65 in the hollow work spindle 26. A compound clamp 66inc1udes a part 61 thereof releasably grasped rupon the end portion of said hollow work spindle adjacent the brake drum 64 and opposite the worm wheel 25 and a part 68 thereof releasably grasped upon an enlarged portion 69 of the arbor 63 adjacent said brake drum.v The compound clamp 66 is adapted to support the varbor 63 and the part of the brake drum 64 to be at the outer side of said flange portion 12. The

end portion of the arbor 63 opposite the brake drum 64 passes snugly through the hollow fitting 10. A nut1lln includes an internal thread adjustably engaging the external thread upon the an- 'nular portion 13, and a split washer 15 is adapted split washer 15, the arbor L63 can be drawn in direction to bring an internal surface of the compound clamp 66 into pressing engagement with the adjacent end of the hollow work spindle 26 to make said arbor `rigid with said hollow work spindle, and by turning said nut inwardly on said annular portion 13 and away from said split washer, the split washer can be released for removal from the annular groove 16, thus to render the arbor 63 removable from the hollow work spindle. When the nut 14 is inpressing engagement with the split washer 15, the arbor 63 and said hollow work spindle are secured to each other `portion of the draw rodhaving said head extending beyond an end of saidhollow work spindle,

l rigid with on end portion of' said hollow work Y and a take-up for causing said arbor to be made spindle, said take-up being constituted by said draw rod, a hollow fitting on said draw rod having a portion thereof engaged against an end of said hollow work spindle and an externally threadedl portion, a nut upon said externally threaded portion of said hollow fitting, and a split washer upon said'drawiio'dandfremovablystuatedibetweemsaid nutandthe headof saddraw rod'.V

2. In combina-tiom a fframe'a support for an article 'tobezoperatedupon consisting ofla hollow Work spindle: rotatably mounted ongsaidy frame, a driving shaft-- for said hollow workspindle, `a worm on. said drivingshaft, a= Worm` wheeLmeshing. with said worm. and` iix-edl` onf said `hollow work spindle, means fixing: said, hollowwork spindle against longitudinal movement, an` arbor. yrigid with' said article,- af. draw rodfinisaid hollow work spindlefand rigid withV said arbor, saiddraw rod having a Y head thereon.y and the `ende-portion. of the draw. rod having said.- head extending; beyond.` an end of said hollow` workspindle, and a; take-up constituted irl-.part by said draw rod andfitshead forxcausingthe arbor.- tofbeimadeiilgid witha part of thezhollow work spindle-whichy is-ad-jacentsaid arbor.

3.,Incombination, a framewa support for an 'rtiole tofbeoperated upon 'consisting otshollow workspindle' rotatably mounted-on saidframe, meansvxing saidv hollow workI spindle against-flou;- gitudinal movement,y a worm wheel and agear keyedupon said hollow work ,spindle for movemerlt longitudinally of the hollow work spindle,

l mea/ns1 including aspaeingsleeve and a locknut uponsaid-hollow Wovkspindle for fixing said worm Wheelo /nclgeark against longitudinal movement. on the hollow workspindle, anarlior rigid with vsaiid article., a draw rod in said hollow work spindle and rigid with said arbor,l said draw rod-havingsa 

